907.5 Safety Resources for Locals - Revision history

Hoskir: S-hal was renamed to Safety Resources for locals and the page updated with more safety information per RR4103

2025-09-10T13:54:35Z

S-hal was renamed to Safety Resources for locals and the page updated with more safety information per RR4103

← Older revision		Revision as of 08:54, 10 September 2025
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	The HAL Manual (Identification, Analysis, and Correction of High-Crash Locations) was re-titled [[media:907.5 SHAL.pdf\|S-HAL (Safety Handbook for Locals)]]. The First Edition of the HAL Manual was published in 1975. The S-HAL allows local~~, non-MoDOT~~ agencies to		There are several resources available to local agencies from both federal and state sources. This article is intended to help give some direction to what resources are available and where to find them.
	~~[[image:907~~.~~5 SHAL.jpg\|right\|375px\|thumb\|<center>'''[[media:907.5 SHAL.pdf\|The S-HAL]]~~ is ~~not MoDOT policy but a supplemental document~~ to ~~the EPG.'''</center>]]~~
	~~:* Develop a traffic record system (Chap 2)~~
	~~:* Perform network screening (Chap 3)~~
	~~:* Using safety analysis tools (Chap 4)~~
	~~:* Implementing safety improvements (Chap 5)~~
	~~:* Conduct road safety audits (Chap 6)~~ and
	~~:* Additional resources (Chap 7)~~.

	~~While the S-HAL was intended for~~ local ~~agencies~~ and ~~law enforcement~~, ~~it can be a tool for~~ MoDOT ~~personnel as well. The S-HAL is not MoDOT policy~~, ~~but only a supplemental document to~~ the ~~Engineering Policy Guide~~ (~~EPG~~). ~~Any~~ information ~~in the S~~-~~HAL that relates to topics in the EPG, the EPG takes precedence~~.		==Agencies and Programs==
			There are three main agencies or programs that produce resources supporting local activities and programs. They are the Federal Highway Administration (FHWA), the Missouri Department of Transportation (MoDOT), and the Missouri Local Technical Assistance Program (LTAP). Each agency offers different types of support. General information about each can be found on their websites.
			* [https://highways.dot.gov/field-offices/missouri Missouri Division FHWA]
			* [https://www.modot.org/about-traffic-safety MoDOT Traffic Safety]
			* [https://mltrc.mst.edu/moltaphome/ LTAP]

	~~{\|style~~=~~"padding~~: 0.~~3em; margin~~-~~right~~:~~10px; border~~:~~2px solid #a9a9a9; text~~-~~align:center; font~~-~~size: 95%; background:#f5f5f5" width="260px" align="left"~~		In addition to the general information, there are specific resources that have been produced. A brief description of those resources and where to find more detailed information is included here.
	\|-
	~~\|'''Additional Information'''~~		==Federal Based Resources==
	\|-		* [https://highways.dot.gov/safety FHWA Highway Safety Programs] – This is a comprehensive website that houses many different safety resources including information on the Highway Safety Manual (HSM), the Highway Safety Improvement Program (HSIP), the Safe Systems Approach, and much more.
	~~\|MoDOT’s~~ safety ~~engineers constantly search for the best practices in the field~~ to ~~improve Missouri roadways’~~ safety.		* [https://highways.dot.gov/safety/proven-safety-countermeasures Proven Safety Countermeasures] – These are a collection of strategies that have been shown to reduce fatalities and serious injuries throughout our nation’s highways.
	\|-		* [https://highways.dot.gov/safety/pedestrian-bicyclist/step/resources Safe Transportation for Every Pedestrian (STEP)] – This is a program focused on pedestrian safety and provides options for where and when to deploy systemic cost-effective countermeasures.
	\|[~~http~~://~~sharepoint~~/~~systemdelivery~~/TR/safety~~/default.aspx Safety Engineering~~]		* [https://highways.dot.gov/safety/local-rural/improving-safety-rural-local-and-tribal-roads-safety-toolkit/step-2-conduct FHWA Network Screening] – This is information specific to what to consider and how to conduct a safety analysis of your roadway network.
	\|-		* [https://highways.dot.gov/safety/data-analysis-tools/rsdp/rsdp-tools/highway-safety-manual-part-c-spreadsheets HSM Spreadsheets] – These are the Excel-based tools that were developed by FHWA to apply the analysis outlined in the HSM.
	\|[~~http~~://~~www~~.~~modot~~.mo.gov/~~safety~~/~~Safety_Engineering~~/~~index~~.~~htm Safety Engineering~~]		* [https://cmfclearinghouse.fhwa.dot.gov/ Crash Modification Factor (CMF) Clearinghouse] – This is the database of produced CMFs that have been determined by various research efforts nationally.
	\|}		* [https://nap.nationalacademies.org/author/NCHRP/transportation-research-board/national-cooperative-highway-research-program National Cooperative Highway Research Program (NCHRP) Documents] – These are various research documents that have been completed with the focus of areas that effect “highway planning, design, construction, operation, and maintenance”.

	~~MoDOT~~ has ~~developed a traffic record system focused on~~ the ~~state maintained roadways and is developing the non-state maintained system~~. ~~MoDOT’s traffic record system is also called the~~ [~~http~~://~~tms~~/~~home~~/ ~~Transportation Management System~~ (~~TMS~~)]~~. The TMS system uses roadway~~ and ~~crash information to develop High Severity lists for intersections and ranges~~. ~~Districts are responsible to review these lists to develop their safety program strategies.~~		==State Based Resources ==
			* [https://www.mltrc.org/mltrc/Safety_Circuit_Rider.asp Safety Circuit Rider] – This program has the goal of supporting local agencies with various technical needs.
	~~While performing network screening on a roadway system, Chapter 3 of the [~~[~~media~~:~~907~~.~~5 SHAL~~.~~pdf\|S-HAL~~]~~] explains some of~~ the ~~types of crash rates used when comparing locations. When comparing locations~~ for ~~a safety analysis, crashes are typically normalized by rate~~. ~~Some of~~ the ~~rates covered by the S-HAL that are used in MoDOT studies include:~~		* [https://epg.modot.org/forms/general_files/TS/SAFER_Document.pdf Safety Assessment For Every Roadway (SAFER)] – This is a program the intent of promoting safety on all projects and asking the right questions within project development.
			* [https://www.savemolives.com/mcrs SaveMOLives] – This is a website that has information about the Missouri Coalition for Roadway Safety. This includes the Strategic Highway Safety Plan (SHSP), behavioral program information, data dashboards, and more.
	~~:* Number of crashes~~		* [https://www.modot.org/modatazone MO DataZone Toolbox] – This is a collection of various resources that MoDOT maintains. These include areas of safety, traffic, planning, etc.
	~~:* Crash severity (EPDO – Equivalent Property Damage Only)~~		* [https://datazoneapps.modot.mo.gov/ExternalAccess/Account/Login?ReturnUrl=%2FExternalAccess%2F Crash Statistics Map] – This is within the MO DataZone Toolbox under safety resources. This resource is maintained by MoDOT and is for the ability to look up crash information that has been received from the Missouri State Highway Patrol (MSHP) in a map-based format. This is only accessible to MoDOT planning partners and those working on MoDOT projects. You can log in or request access on the external site.
	~~:* Crash rate~~		* [https://www.mshp.dps.missouri.gov/TR15Map/index.jsp MSHP Crash Map] – This is a map that shows the current year’s fatal crashes and is maintained by MSHP.
	~~:* Severity Rate~~ (~~EPDO by rate~~)		* [https://www.modot.org/research-publications MoDOT Research Publications] – These are the final reports of the various research projects that MoDOT has conducted. The findings can be useful for more state specific data and can address more MoDOT specific initiatives.
			* [https://epg.modot.org/files/3/35/907.5_SHAL.pdf Safety Handbook for Locals (S-HAL)] – This is a manual that is geared toward providing additional guidance and information to local agencies and law enforcement. It includes topics such as performing network screening, using safety analysis tools, implementing safety improvement, and more.
	~~Once potential problem locations are identified~~, ~~Chapter 4 of the S-HAL recommends~~ information ~~to gather to complete a traffic study~~. ~~The procedure outlined in the S-HAL can be applied to any request for a field study~~. ~~The first recommendation is to review crashes and complete a collision diagram~~. ~~A collision diagram (S-HAL, Figure 4-1)~~ is a ~~spot map~~ that ~~shows where crashes are occurring, either within the intersection or along the range~~. ~~The collision diagram will show the vehicle action, angle~~ of ~~collision and general location of the crash compared to the roadway. Other information important to the crash is included such as date~~, ~~time of day, roadway/weather conditions~~, ~~crash severity~~, etc. ~~The TMS Accident Browser application uses computer software to produce an automated collision diagram for a single intersection~~. ~~The collision diagram aids in identifying~~ the ~~predominant crash pattern at that location~~.

	~~Another process in a traffic study~~ is ~~to perform an on-site observation. Depending on the crash history, it may be important to perform the observation both during the day~~ and ~~at night. The location should be driven from each direction. If there~~ is ~~a possibility~~ for ~~pedestrian travel,~~ the ~~location should be walked in order~~ to ~~view~~ the ~~road, as a pedestrian would experience it. The on-site report~~ (~~S-HAL, Figure 4-2~~) ~~should identify the location of the observation points, identify potential hazards by making~~ a ~~physical checklist, make notations regarding pedestrian and driver activity, take photos and interview local people for their observations of the location~~. ~~When evaluating potential locations, it~~ is ~~important~~ to ~~draw a condition diagram (S-HAL, Figure 4-3), a drawing (to scale, if practical), of the existing roadway, control device locations~~ and ~~major features~~ in the ~~nearby environment~~. ~~The condition diagram may also include physical road conditions, signing, striping, etc~~. ~~that may be important in determining a countermeasure analysis~~. ~~Also included when performing~~ a ~~field observation are traffic counts, spot speed studies~~ and ~~sight distance evaluations~~. ~~The S~~-~~HAL has included worksheets to assist in~~ the ~~development~~ of the ~~location analysis (S-HAL, Figure 4-4)~~.

	~~A Highway Safety Manual analysis should~~ be ~~completed when evaluating safety needs~~ and ~~this analysis is better described in Chapter 4~~. ~~Tables 4~~.~~4 through 4~~.~~10 are example worksheets relating to the inputs required~~ for ~~Highway Safety Manual analysis.~~

	~~According to Chapter 5 of~~ S-HAL~~, after the locations have been identified, crashes analyzed~~ and ~~field data gathered, the corrective actions are determined~~. ~~With most locations~~, ~~there are potential low cost solutions~~, ~~medium cost solutions~~, and ~~high cost solutions~~.


	[[Category:907 Traffic Safety\|907.05]]		[[Category:907 Traffic Safety\|907.05]]

Hoskir: Hoskir moved page 907.5 S-HAL to 907.5 Safety Resources for Locals: renamed do to RR4103

2025-09-10T13:37:38Z

Hoskir moved page 907.5 S-HAL to 907.5 Safety Resources for Locals: renamed do to RR4103

← Older revision	Revision as of 08:37, 10 September 2025
(No difference)

Hoskir: updated

2023-09-19T17:02:49Z

updated

← Older revision		Revision as of 12:02, 19 September 2023
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	[[Category:907 Traffic Safety]]		[[Category:907 Traffic Safety\|907.05]]

Smithk at 19:42, 22 November 2021

2021-11-22T19:42:45Z

← Older revision		Revision as of 14:42, 22 November 2021
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	\|}		\|}

	MoDOT has developed a traffic record system focused on the state maintained roadways and is developing the non-state maintained system. MoDOT’s traffic record system is also called the [http://~~tmshome~~ Transportation Management System (TMS)]. The TMS system uses roadway and crash information to develop High Severity lists for intersections and ranges. Districts are responsible to review these lists to develop their safety program strategies.		MoDOT has developed a traffic record system focused on the state maintained roadways and is developing the non-state maintained system. MoDOT’s traffic record system is also called the [http://tms/home/ Transportation Management System (TMS)]. The TMS system uses roadway and crash information to develop High Severity lists for intersections and ranges. Districts are responsible to review these lists to develop their safety program strategies.

	While performing network screening on a roadway system, Chapter 3 of the [[media:907.5 SHAL.pdf\|S-HAL]] explains some of the types of crash rates used when comparing locations. When comparing locations for a safety analysis, crashes are typically normalized by rate. Some of the rates covered by the S-HAL that are used in MoDOT studies include:		While performing network screening on a roadway system, Chapter 3 of the [[media:907.5 SHAL.pdf\|S-HAL]] explains some of the types of crash rates used when comparing locations. When comparing locations for a safety analysis, crashes are typically normalized by rate. Some of the rates covered by the S-HAL that are used in MoDOT studies include:

Smithk: Per TS, additional clarification of guidance

2015-11-24T17:09:27Z

Per TS, additional clarification of guidance

← Older revision		Revision as of 12:09, 24 November 2015
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	The HAL Manual (Identification, Analysis, and Correction of High-Crash Locations) was re-titled [[media:907.5 SHAL.pdf\|S-HAL (Safety Handbook for Locals)]]. The First Edition of the HAL Manual was published in 1975. The S-HAL allows local, non-MoDOT agencies to		The HAL Manual (Identification, Analysis, and Correction of High-Crash Locations) was re-titled [[media:907.5 SHAL.pdf\|S-HAL (Safety Handbook for Locals)]]. The First Edition of the HAL Manual was published in 1975. The S-HAL allows local, non-MoDOT agencies to
	[[image:907.5 SHAL.jpg\|right\|375px\|thumb\|<center>'''[[media:907.5 SHAL.pdf\|The S-HAL]] is not MoDOT policy but a supplemental document to the EPG.'''</center>]]		[[image:907.5 SHAL.jpg\|right\|375px\|thumb\|<center>'''[[media:907.5 SHAL.pdf\|The S-HAL]] is not MoDOT policy but a supplemental document to the EPG.'''</center>]]
	:*Develop a traffic record system (Chap 2)		:* Develop a traffic record system (Chap 2)
	:*~~Identify high crash locations~~ (Chap 3)		:* Perform network screening (Chap 3)
	:*~~Analyze high crash locations~~ (Chap 4)		:* Using safety analysis tools (Chap 4)
	:*~~Correct high crash locations~~ (Chap 5) ~~and~~		:* Implementing safety improvements (Chap 5)
	:*Conduct ~~Road Safety Audits~~ (Chap 6).		:* Conduct road safety audits (Chap 6) and
			:* Additional resources (Chap 7).

	While the S-HAL was intended for local agencies and law enforcement, it ~~has become~~ a tool for MoDOT personnel as well. The S-HAL is not MoDOT policy, but only a supplemental document to the Engineering Policy Guide (EPG). Any information in the S-HAL that relates to topics in the EPG, the EPG takes precedence.		While the S-HAL was intended for local agencies and law enforcement, it can be a tool for MoDOT personnel as well. The S-HAL is not MoDOT policy, but only a supplemental document to the Engineering Policy Guide (EPG). Any information in the S-HAL that relates to topics in the EPG, the EPG takes precedence.

	{\|style="padding: 0.3em; margin-right:10px; border:2px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="260px" align="left"		{\|style="padding: 0.3em; margin-right:10px; border:2px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="260px" align="left"
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	MoDOT has developed a traffic record system focused on the state maintained roadways and is developing the non-state maintained system. MoDOT’s traffic record system is also called the [http://tmshome Transportation Management System (TMS)]. The TMS system uses roadway and crash information to develop High Severity lists for intersections and ranges. Districts are responsible to review these lists to develop their safety program strategies.		MoDOT has developed a traffic record system focused on the state maintained roadways and is developing the non-state maintained system. MoDOT’s traffic record system is also called the [http://tmshome Transportation Management System (TMS)]. The TMS system uses roadway and crash information to develop High Severity lists for intersections and ranges. Districts are responsible to review these lists to develop their safety program strategies.

	While ~~identifying high crash corridors~~, Chapter 3 of the [[media:907.5 SHAL.pdf\|S-HAL]] explains some of the types of crash rates used when comparing locations. When comparing locations for a safety analysis, crashes are typically normalized by rate. Some of the rates covered by the S-HAL that are used in MoDOT studies include:		While performing network screening on a roadway system, Chapter 3 of the [[media:907.5 SHAL.pdf\|S-HAL]] explains some of the types of crash rates used when comparing locations. When comparing locations for a safety analysis, crashes are typically normalized by rate. Some of the rates covered by the S-HAL that are used in MoDOT studies include:

	:* Number of crashes		:* Number of crashes
	:* Crash severity (EPDO – Equivalent Property Damage Only)		:* Crash severity (EPDO – Equivalent Property Damage Only)
	:* Crash rate		:* Crash rate
	~~:* Number-Rate~~
	:* Severity Rate (EPDO by rate)		:* Severity Rate (EPDO by rate)
	~~:* Number-Quality-Control & Rate-Quality-Control~~

	~~After high crash~~ locations are identified, Chapter 4 of the S-HAL recommends information to gather to complete a traffic study. The procedure outlined in the S-HAL can be applied to any request for a field study. The first recommendation is to review crashes and complete a collision diagram. A collision diagram (S-HAL, Figure 4-1) is a spot map that shows where crashes are occurring, either within the intersection or along the range. The collision diagram will show the vehicle action, angle of collision and general location of the crash compared to the roadway. Other information important to the crash is included such as date, time of day, roadway/weather conditions, crash severity, etc. The TMS Accident Browser application uses computer software to produce an automated collision diagram for a single intersection. The collision diagram aids in identifying the predominant crash pattern at that location.		Once potential problem locations are identified, Chapter 4 of the S-HAL recommends information to gather to complete a traffic study. The procedure outlined in the S-HAL can be applied to any request for a field study. The first recommendation is to review crashes and complete a collision diagram. A collision diagram (S-HAL, Figure 4-1) is a spot map that shows where crashes are occurring, either within the intersection or along the range. The collision diagram will show the vehicle action, angle of collision and general location of the crash compared to the roadway. Other information important to the crash is included such as date, time of day, roadway/weather conditions, crash severity, etc. The TMS Accident Browser application uses computer software to produce an automated collision diagram for a single intersection. The collision diagram aids in identifying the predominant crash pattern at that location.

	Another process in a traffic study is to perform an on-site observation. Depending on the crash history, it may be important to perform the observation both during the day and at night. The location should be driven from each direction. If there is a possibility for pedestrian travel, the location should be walked in order to view the road, as a pedestrian would experience it. The on-site report (S-HAL, Figure 4-2) should identify the location of the observation points, identify potential hazards by making a physical checklist, make notations regarding pedestrian and driver activity, take photos and interview local people for their observations of the location. When ~~identifying~~ potential ~~hazards~~, it is important to draw a condition diagram (S-HAL, Figure 4-3), a drawing (to scale, if practical), of the existing roadway, control device locations and major features in the nearby environment. The condition diagram may also include physical road conditions, signing, striping, etc. that may be important in determining a countermeasure analysis. Also included when performing a field observation are traffic counts, spot speed studies and sight distance evaluations. The S-HAL has included worksheets to assist in the development of the location analysis (S-HAL, Figure 4-4).		Another process in a traffic study is to perform an on-site observation. Depending on the crash history, it may be important to perform the observation both during the day and at night. The location should be driven from each direction. If there is a possibility for pedestrian travel, the location should be walked in order to view the road, as a pedestrian would experience it. The on-site report (S-HAL, Figure 4-2) should identify the location of the observation points, identify potential hazards by making a physical checklist, make notations regarding pedestrian and driver activity, take photos and interview local people for their observations of the location. When evaluating potential locations, it is important to draw a condition diagram (S-HAL, Figure 4-3), a drawing (to scale, if practical), of the existing roadway, control device locations and major features in the nearby environment. The condition diagram may also include physical road conditions, signing, striping, etc. that may be important in determining a countermeasure analysis. Also included when performing a field observation are traffic counts, spot speed studies and sight distance evaluations. The S-HAL has included worksheets to assist in the development of the location analysis (S-HAL, Figure 4-4).

			A Highway Safety Manual analysis should be completed when evaluating safety needs and this analysis is better described in Chapter 4. Tables 4.4 through 4.10 are example worksheets relating to the inputs required for Highway Safety Manual analysis.

	According to Chapter 5 of S-HAL, after the locations have been identified, crashes analyzed and field data gathered, the corrective actions are determined. With most locations, there are potential low cost solutions, medium cost solutions, and high cost solutions.		According to Chapter 5 of S-HAL, after the locations have been identified, crashes analyzed and field data gathered, the corrective actions are determined. With most locations, there are potential low cost solutions, medium cost solutions, and high cost solutions.

Smithk at 13:46, 24 November 2015

2015-11-24T13:46:54Z

← Older revision		Revision as of 08:46, 24 November 2015
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	\|MoDOT’s safety engineers constantly search for the best practices in the field to improve Missouri roadways’ safety.		\|MoDOT’s safety engineers constantly search for the best practices in the field to improve Missouri roadways’ safety.
	\|-		\|-
	\|[http://~~wwwi.gh.modot.local~~/~~intranet~~/tr/safety/ Safety Engineering]		\|[http://sharepoint/systemdelivery/TR/safety/default.aspx Safety Engineering]
	\|-		\|-
	\|[http://www.modot.mo.gov/safety/Safety_Engineering/index.htm Safety Engineering]		\|[http://www.modot.mo.gov/safety/Safety_Engineering/index.htm Safety Engineering]

Smithk at 13:45, 24 November 2015

2015-11-24T13:45:39Z

← Older revision		Revision as of 08:45, 24 November 2015
Line 1:		Line 1:
	The HAL Manual (Identification, Analysis, and Correction of High-Crash Locations) was re-titled [[media:907.5 SHAL.pdf\|S-HAL (Safety Handbook for Locals)]]. The First Edition of the HAL Manual was published in 1975. The HAL ~~Manual allowed~~ local, non-MoDOT agencies to		The HAL Manual (Identification, Analysis, and Correction of High-Crash Locations) was re-titled [[media:907.5 SHAL.pdf\|S-HAL (Safety Handbook for Locals)]]. The First Edition of the HAL Manual was published in 1975. The S-HAL allows local, non-MoDOT agencies to
	[[image:907.5 SHAL.jpg\|right\|375px\|thumb\|<center>'''[[media:907.5 SHAL.pdf\|The S-HAL]] is not MoDOT policy but a supplemental document to the EPG.'''</center>]]		[[image:907.5 SHAL.jpg\|right\|375px\|thumb\|<center>'''[[media:907.5 SHAL.pdf\|The S-HAL]] is not MoDOT policy but a supplemental document to the EPG.'''</center>]]
	:*Develop a traffic record system (Chap 2)		:*Develop a traffic record system (Chap 2)

Smithk at 13:44, 24 November 2015

2015-11-24T13:44:29Z

← Older revision		Revision as of 08:44, 24 November 2015
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	While the S-HAL was intended for local agencies and law enforcement, it has become a tool for MoDOT personnel as well. The S-HAL is not MoDOT policy, but only a supplemental document to the Engineering Policy Guide (EPG). Any information in the S-HAL that relates to topics in the EPG, the EPG takes precedence.		While the S-HAL was intended for local agencies and law enforcement, it has become a tool for MoDOT personnel as well. The S-HAL is not MoDOT policy, but only a supplemental document to the Engineering Policy Guide (EPG). Any information in the S-HAL that relates to topics in the EPG, the EPG takes precedence.

	{\|style="padding: 0.3em; margin-right:~~7px~~; border:2px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="260px" align="left"		{\|style="padding: 0.3em; margin-right:10px; border:2px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="260px" align="left"
	\|-		\|-
	\|'''Additional Information'''		\|'''Additional Information'''
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	MoDOT has developed a traffic record system focused on the state maintained roadways and is developing the non-state maintained system. MoDOT’s traffic record system is also called the [http://tmshome Transportation Management System (TMS)]. The TMS system uses roadway and crash information to develop High Severity lists for intersections and ranges. Districts are responsible to review these lists to develop their safety program strategies.		MoDOT has developed a traffic record system focused on the state maintained roadways and is developing the non-state maintained system. MoDOT’s traffic record system is also called the [http://tmshome Transportation Management System (TMS)]. The TMS system uses roadway and crash information to develop High Severity lists for intersections and ranges. Districts are responsible to review these lists to develop their safety program strategies.

	While identifying high crash corridors, Chapter 3 of the [[media:907.5 SHAL.pdf\|S-HAL]] explains some of the types of crash rates used when comparing locations. When comparing locations for a safety analysis, crashes are typically normalized by rate. Some of the rates covered by the HAL ~~Manual~~ that are used in MoDOT studies include:		While identifying high crash corridors, Chapter 3 of the [[media:907.5 SHAL.pdf\|S-HAL]] explains some of the types of crash rates used when comparing locations. When comparing locations for a safety analysis, crashes are typically normalized by rate. Some of the rates covered by the S-HAL that are used in MoDOT studies include:

	:* Number of crashes		:* Number of crashes
Line 31:		Line 31:
	:* Number-Quality-Control & Rate-Quality-Control		:* Number-Quality-Control & Rate-Quality-Control

	After high crash locations are identified, Chapter 4 of the S-HAL recommends information to gather to complete a traffic study. The procedure outlined in the S-HAL can be applied to any request for a field study. The first recommendation is to review crashes and complete a collision diagram. A collision diagram (S-HAL ~~Manual~~, Figure 4-1) is a spot map that shows where crashes are occurring, either within the intersection or along the range. The collision diagram will show the vehicle action, angle of collision and general location of the crash compared to the roadway. Other information important to the crash is included such as date, time of day, roadway/weather conditions, crash severity, etc. The TMS Accident Browser application uses computer software to produce an automated collision diagram for a single intersection. The collision diagram aids in identifying the predominant crash pattern at that location.		After high crash locations are identified, Chapter 4 of the S-HAL recommends information to gather to complete a traffic study. The procedure outlined in the S-HAL can be applied to any request for a field study. The first recommendation is to review crashes and complete a collision diagram. A collision diagram (S-HAL, Figure 4-1) is a spot map that shows where crashes are occurring, either within the intersection or along the range. The collision diagram will show the vehicle action, angle of collision and general location of the crash compared to the roadway. Other information important to the crash is included such as date, time of day, roadway/weather conditions, crash severity, etc. The TMS Accident Browser application uses computer software to produce an automated collision diagram for a single intersection. The collision diagram aids in identifying the predominant crash pattern at that location.

	Another process in a traffic study is to perform an on-site observation. Depending on the crash history, it may be important to perform the observation both during the day and at night. The location should be driven from each direction. If there is a possibility for pedestrian travel, the location should be walked in order to view the road, as a pedestrian would experience it. The on-site report (S-HAL, Figure 4-2) should identify the location of the observation points, identify potential hazards by making a physical checklist, make notations regarding pedestrian and driver activity, take photos and interview local people for their observations of the location. When identifying potential hazards, it is important to draw a condition diagram (S-HAL, Figure 4-3), a drawing (to scale, if practical), of the existing roadway, control device locations and major features in the nearby environment. The condition diagram may also include physical road conditions, signing, striping, etc. that may be important in determining a countermeasure analysis. Also included when performing a field observation are traffic counts, spot speed studies and sight distance evaluations. The S-HAL has included worksheets to assist in the development of the location analysis (S-HAL, Figure 4-4).		Another process in a traffic study is to perform an on-site observation. Depending on the crash history, it may be important to perform the observation both during the day and at night. The location should be driven from each direction. If there is a possibility for pedestrian travel, the location should be walked in order to view the road, as a pedestrian would experience it. The on-site report (S-HAL, Figure 4-2) should identify the location of the observation points, identify potential hazards by making a physical checklist, make notations regarding pedestrian and driver activity, take photos and interview local people for their observations of the location. When identifying potential hazards, it is important to draw a condition diagram (S-HAL, Figure 4-3), a drawing (to scale, if practical), of the existing roadway, control device locations and major features in the nearby environment. The condition diagram may also include physical road conditions, signing, striping, etc. that may be important in determining a countermeasure analysis. Also included when performing a field observation are traffic counts, spot speed studies and sight distance evaluations. The S-HAL has included worksheets to assist in the development of the location analysis (S-HAL, Figure 4-4).

Smithk at 13:41, 24 November 2015

2015-11-24T13:41:34Z

← Older revision		Revision as of 08:41, 24 November 2015
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	:*Analyze high crash locations (Chap 4)		:*Analyze high crash locations (Chap 4)
	:*Correct high crash locations (Chap 5) and		:*Correct high crash locations (Chap 5) and
	:*Conduct Road Safety Audits(Chap 6).		:*Conduct Road Safety Audits (Chap 6).

	While the S-HAL was intended for local agencies and law enforcement, it has become a tool for MoDOT personnel as well. The S-HAL is not MoDOT policy, but only a supplemental document to the Engineering Policy Guide (EPG). Any information in the S-HAL that relates to topics in the EPG, the EPG takes precedence.		While the S-HAL was intended for local agencies and law enforcement, it has become a tool for MoDOT personnel as well. The S-HAL is not MoDOT policy, but only a supplemental document to the Engineering Policy Guide (EPG). Any information in the S-HAL that relates to topics in the EPG, the EPG takes precedence.

Smithk: 907.5 HAL Manual moved to 907.5 S-HAL: Per Traffic and Safety, article was re-titled and updated to reflect the new name of the HAL publication: S-HAL

2015-11-24T13:39:44Z

907.5 HAL Manual moved to 907.5 S-HAL: Per Traffic and Safety, article was re-titled and updated to reflect the new name of the HAL publication: S-HAL

← Older revision	Revision as of 08:39, 24 November 2015
(No difference)